CN109161392A - A kind of external heat type rotary furnace coal pyrolysis device and method with internal dedusting - Google Patents
A kind of external heat type rotary furnace coal pyrolysis device and method with internal dedusting Download PDFInfo
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- CN109161392A CN109161392A CN201811094585.2A CN201811094585A CN109161392A CN 109161392 A CN109161392 A CN 109161392A CN 201811094585 A CN201811094585 A CN 201811094585A CN 109161392 A CN109161392 A CN 109161392A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B31/00—Charging devices
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/30—Other processes in rotary ovens or retorts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/026—Dust removal by centrifugal forces
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Abstract
The invention discloses a kind of external heat type rotary furnace coal pyrolysis device and method for pyrolysis with internal dedusting, pyrolysis installation includes rotary drying furnace, lifting device, dust-extraction unit, surge bunker, charging rotary valve, feed auger, Whirlwind cyclone, depositing dust case, rotary dry distillation furnace, recovery of chemical products system, revolution cooling furnace, ash-valve.Corresponding method for pyrolysis are as follows: raw coal enters rotary dry distillation furnace after rotary drying furnace is dry, pyrolytic reaction occurs in rotary dry distillation furnace and generates raw coke oven gas and semicoke, raw coke oven gas passes through the depositing dust case depositing dust at rotary dry distillation stokehold end, and be arranged in depositing dust case after one group of Whirlwind cyclone dedusting, into recovery of chemical products system.The tar and gas quality that low energy consumption for whole system, is produced are good.
Description
Technical field
The present invention relates to a kind of external heat type rotary furnace coal pyrolysis device and method for pyrolysis with internal dust-extraction unit,
Belong to low-temperature pyrolysis of coal technical field.
Background technique
Coal is the fossil energy for integrating energy and Organic Ingredients that the Nature vouchsafes the mankind.It is " rich according to China
The endowment of resources of coal, oil-poor, few gas ", within suitable long-term, coal will be the weight of China's energy and Organic Chemicals
Want source.The utilization of Coal Clean Efficient Conversion is carried forward vigorously, will promote the upgrading of China's energy structure optimizing, pushes energy leather
The most real effective approach of life.Coal mining, processing, transport, conversion, the whole process utilized are all along with energy consumption, material consumption
And waste discharge, to realize that its high-efficiency cleaning utilizes it is necessary to minimum, minimum emissions of pursuing the total energy consumption of overall process, material consumption, with
While reaching the energy conversion gross efficiency highest of Life cycle, its conversion is made to be reassembled as most valuable substance.Pass through coal
Charcoal pyrolytic technique obtains coal tar, semicoke and coal gas, not only can be used as an important supplement of petroleum resources, and can be with
Realize that the clean and effective of coal utilizes.
Coal pyrolysis technology has obtained significant progress in recent years, has outer heat for the pulverized coal pyrolysis of the fine coal of 0-30mm
Formula rotary furnace pyrolytic process, fluidized bed gas heat carrier pyrolysis technique, solid heat carrier pyrolysis technique etc., no matter which kind of technique
Respectively there are advantage and disadvantage.
External heat type rotary furnace pyrolytic process is using high-temperature flue gas in revolution furnace tube external circulation heating, and heat passes through cylinder
Body reaches material.Process stream tumbling motion in cylinder, heat transfer is uniform, good effect of heat exchange；High-temperature flue gas is not straight with material
Contact, is mixed into coal gas without a large amount of inert gas, and coal gas active principle content is high, and gas volume is few, subsequent recovery of chemical products
Treating capacity is few, has saved investment.The technique uniquely has large industrialized device, but the technique in many pulverized coal pyrolysis technologies
Material is in tumbling motion state always in rotary furnace, and thinner dust can raise in cylinder, after entering with raw coke oven gas
Continuous recovery of chemical products process reduces the quality of tar, and the conveying of dust-laden raw coke oven gas easily makes pipeline dust accumulation, blocks pipeline.
Fluidized bed gas heat carrier pyrolysis technique is directly heated to material using hot fume, and material is in riser
It is interior to be heated in hot fume lifting process, pyrolytic reaction occurs.The advantages of this technique is that material heat-transfer effect is good, pyrolysis speed
Degree is fast.This processing disadvantages is that material and hot fume directly contact, and heating flue gas is mixed into raw coke oven gas, and gas quality is low；Furthermore
This process stream is in fluidized state, is easy to produce a large amount of dust, and very big pressure is brought to subsequent dust pelletizing system.
Solid heat carrier pyrolysis technique is to be added heat carrier in heating system using Ceramic Balls, quartz sand, semicoke etc.
After heat to certain temperature, the heat carrier after heating is mixed with material, heat is reached material by heat carrier, completes pyrolytic process.
This technology heating flue gas is not directly contacted with material, and calorific value of gas is high.This method for pyrolysis system complex, energy consumption is high, heat carrier
It is high with semicoke isolation technics difficulty, lead to tar product poor quality.
To sum up, more or less there is certain technological deficiency, especially high temperature raw coke oven gas in current pulverized coal pyrolysis technology
Dust removal problem, seriously affected the continuous operation of device and the quality of tar product.
Summary of the invention
To solve drawbacks described above existing in the prior art, the purpose of the present invention is to provide a kind of novel with interior
The external heat type rotary furnace coal pyrolysis device and method for pyrolysis of portion's dedusting increase depositing dust case, depositing dust case at rotary dry distillation stokehold end
One group of Whirlwind cyclone of interior arrangement, the raw coke oven gas with dust enter back into recovery of chemical products work after depositing dust case depositing dust and Whirlwind cyclone dedusting
Sequence, low energy consumption for whole system, the tar produced and gas quality are good.
The present invention is realized by following technical proposals.
A kind of external heat type rotary furnace coal pyrolysis method with internal dedusting of the present invention, comprising the following steps:
(1) raw coal of 0-30mm partial size is dry to obtained moisture-free coal after moisture≤7% by rotary drying furnace, it is described
Moisture-free coal is made, moisture-free coal lifting device is discharged by the rotation of the rotary drying furnace body；
(2) moisture-free coal is promoted to moisture-free coal surge bunker by the moisture-free coal lifting device, and the moisture-free coal is successively
Rotary dry distillation furnace is sent by charging rotary valve, feed auger；
(3) by hot fume indirect heating in rotary dry distillation furnace pyrolytic reaction occurs for the moisture-free coal, generates raw coke oven gas
With hot semicoke；
(4) raw coke oven gas is removed by the depositing dust case depositing dust and Whirlwind cyclone being connected directly with rotary dry distillation stokehold end
Enter recovery of chemical products process after dirt, the coal gas and toluene insolubles≤4% without dust are obtained by the recovery of chemical products process
Coal tar；
(5) the hot semicoke is discharged into revolution cooling furnace by the rotation of the rotary dry distillation furnace, is cooled down in the revolution
It is discharged after the hot semicoke is cooled in furnace, semicoke is made.
For above-mentioned technical proposal, there are also further preferred schemes by the present invention:
Further, in step (3), moisture-free coal in rotary dry distillation furnace by hot fume indirect heating when, heating temperature is
500-700 DEG C, heating time 50-180min.
Further, in step (5), in revolution cooling furnace, hot semicoke is cooled to 30-100 DEG C.
Further, the dust that Whirlwind cyclone is collected is directly entered feed auger, and the dust that depositing dust case is collected is arranged by ash-valve
Out.
Further, revolution cooling furnace using in built-in tubulation recirculated cooling water with it is cold by the way of hot semicoke indirect heat exchange
But.
The present invention gives a kind of external heat type rotary furnace coal pyrolysis device with internal dedusting, including revolution in turn
Drying oven, moisture-free coal lifting device, the moisture-free coal surge bunker being connected to rotary drying furnace, moisture-free coal surge bunker pass through charging rotation
Rotary valve is connected to depositing dust case with feed auger, and depositing dust case is connected to rotary dry distillation furnace；Whirlwind cyclone, Whirlwind cyclone connection are equipped in depositing dust case
To recovery of chemical products system；Rotary dry distillation furnace connection revolution cooling furnace.
Further, the rotary dry distillation furnace is communicated with dust cleaning case, and rotary drying furnace is that internal heat type or external-heating revolving are dry
Furnace, dust cleaning case are provided with collet, hot fume heat tracing are passed through in the collet.
Further, the rotary dry distillation furnace uses hot fume indirect heating, and the indirect heating can be cylinder jacket type
Structure, built-in tubular structure or cylinder jacket type and built-in tubular structure.
Further, depositing dust case is connected directly with rotary dry distillation furnace tube leading portion by static and dynamic sealing.
Further, the depositing dust case is acted on by gravitational settling and carries out primary depositing dust to dust-laden raw coke oven gas.
Further, the Whirlwind cyclone is arranged in depositing dust case, can be one or more, can be arranged in rows when multiple
It can arrange in a ring；Dusty gas rotates into the Whirlwind cyclone along a tangential direction, leans on centrifugal force by dust and famine
Dust catching is simultaneously made the dust pass through ash releasing tube by coal gas separation in the ash releasing tube of the Whirlwind cyclone, then by gravity
Flow into the feed auger.
The present invention has the advantages that due to taking above technical scheme
(1) dust-extraction unit and furnace body are connected directly, eliminate the pipe conveying procedure of high dust-laden famine pyrolysis gas, thus
Avoid the problem of pipeline dust accumulation leads to waste pyrolysis gas line clogging；
(2) by dust-extraction unit and furnace body integrated design, reduce temperature drop of the waste pyrolysis gas from furnace body to dust-extraction unit,
To avoid tar from being precipitated from waste pyrolysis gas；
(3) by depositing dust case and the dual dedusting of Whirlwind cyclone, product tar quality is good, and toluene insolubles are down to 4% or less.
(4) low energy consumption, the tar produced and gas quality are good, pollution-free for whole system.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not
Inappropriate limitation of the present invention is constituted, in the accompanying drawings:
Fig. 1 is the external heat type rotary furnace coal pyrolysis apparatus structure schematic diagram and heat of the present invention with internal dedusting
Solve method flow schematic diagram.
Fig. 2 is Whirlwind cyclone of the present invention arrangement and depositing dust case and rotary dry distillation furnace attachment structure schematic diagram.
Fig. 3 is Whirlwind cyclone structural schematic diagram of the present invention.
Wherein, in Fig. 1-Fig. 3 component and appended drawing reference corresponding relationship are as follows:
In figure: 1- rotary drying furnace；2- moisture-free coal lifting device；3- dust-extraction unit；4- moisture-free coal surge bunker；5- charging
Rotary valve；6- feed auger；7- Whirlwind cyclone；8- depositing dust case；9- rotary dry distillation furnace；10- recovery of chemical products system；11- revolution cooling
Furnace；12- ash-valve；13- Whirlwind cyclone raw coke oven gas entrance；The outlet of 14- Whirlwind cyclone raw coke oven gas；15- static and dynamic sealing；16- ash releasing tube.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the present invention will be described in detail, schematic implementation of the invention herein
Example and explanation are used to explain the present invention, but not as a limitation of the invention.
As shown in Fig. 1, a kind of rotary coal pyrolysis device with internal dust-extraction unit provided by the present invention,
Including rotary drying furnace 1, moisture-free coal lifting device 2, dust-extraction unit 3, moisture-free coal surge bunker 4, charging rotary valve 5, feed auger
6, Whirlwind cyclone 7, depositing dust case 8, rotary dry distillation furnace 9, recovery of chemical products system 10, revolution cooling furnace 11, ash-valve 12.Wherein turn round
Drying oven 1 and moisture-free coal surge bunker 4 are connected by moisture-free coal lifting device 2；Dust-extraction unit 3 is connect with rotary drying furnace 1；Its
In, rotary drying furnace 1 is internal heat type or external-heat.Feed auger 6 is connected with surge bunker 4 by feeding rotary valve 5；Dust cleaning case 8
Be located at turn around the front end of gas retort 9, connected by static and dynamic sealing 15: wherein dust cleaning case 8 uses jacket type structure, carries out heat
Flue gas heat tracing.Feed auger 6 passes through depositing dust case 8 and is installed on rotary dry distillation stokehold end；Whirlwind cyclone 7 is installed on the interior of depositing dust case 8
Portion can be one or more, can be arranged in rows, and can also arrange in a ring, the ash releasing tube 16 and feed auger of Whirlwind cyclone 7
6 are connected；Ash-valve 12 is connected with depositing dust case 8；The gas outlet of Whirlwind cyclone 7 is connected with recovery of chemical products system 10；Rotary dry distillation furnace 9
It is connected with revolution cooling furnace 11.
Wherein, rotary dry distillation furnace 9 uses hot fume indirect heating, can be cylinder jacket type, built-in shell and tube, or
The two has concurrently.
Fig. 2 shows Whirlwind cyclone arrangement and depositing dust casees and rotary dry distillation furnace connection structure, depositing dust case 8 and rotary dry distillation furnace 9
Cylinder leading portion be connected directly by static and dynamic sealing 15, several Whirlwind cyclones 7 on depositing dust case 8 are equipped with Whirlwind cyclone raw coke oven gas
Entrance 13 and Whirlwind cyclone raw coke oven gas outlet 14.
Fig. 3 shows whirlwind minor structure, until setting Whirlwind cyclone raw coke oven gas outlet 14, Whirlwind cyclone famine coal at the top of 7 cylinder of Whirlwind cyclone
Gas entrance is passed through along a tangential direction from 7 cylinder lateral wall of Whirlwind cyclone, and 7 cylinder body bottom of Whirlwind cyclone is ash releasing tube 16.
Method for pyrolysis the following steps are included:
(1) after the raw coal of 0-30mm partial size is by the drying to moisture≤7% of rotary drying furnace 1, pass through the rotary rowed of furnace body
It removes into moisture-free coal lifting device 2；The vapor and dust generated in drying process passes through qualified discharge after 3 dedusting of dust-extraction unit；
(2) moisture-free coal is promoted to moisture-free coal surge bunker 4 by moisture-free coal lifting device 2, and moisture-free coal passes sequentially through charging rotation
Rotary valve 5, feed auger 6 are sent into rotary dry distillation furnace 9；
(3) moisture-free coal is in rotary dry distillation furnace 9 by hot fume indirect heating 50-180min, heating temperature 500-700
DEG C, pyrolytic reaction occurs, generates raw coke oven gas and hot semicoke；
(4) raw coke oven gas horizontally enters into rotary dry distillation stokehold end depositing dust case 8, due to being become larger by area, raw coke oven gas stream
Fast to reduce suddenly, the dust of larger particles separates under gravity and inertia force effect with gas, is deposited to deduster cone bottom point.
After removing large dust particle by depositing dust case 8, dusty gas enters Whirlwind cyclone 7 along a tangential direction and rotates, and leans on centrifugal force
Dust is separated with raw coke oven gas and by dust catching in barrel wall, then fall into ash releasing tube by gravity.Raw coke oven gas after dedusting
Into recovery of chemical products process 10, coal gas and tar are obtained by recovery of chemical products process 10.
(5) dust generated in Whirlwind cyclone 7 is directly discharged into feed auger by 7 lower part ash releasing tube of Whirlwind cyclone；Depositing dust case
The dust generated in 8 periodically passes through outside 12 discharge system of ash-valve；
(6) hot semicoke is discharged into revolution cooling furnace 11 by the rotation of rotary dry distillation furnace 9, the heat in revolution cooling furnace 11
After semicoke is cooled to 30-100 DEG C outside discharge system.
The present invention is further illustrated below by specific embodiment.
Embodiment 1
Using the raw coal of 6-30mm partial size, analysis indexes are shown in Table -1, dry to moisture 5%, revolution by rotary drying furnace
Drying oven is using external-heat steam pipe type rotary drying furnace.Moisture-free coal is discharged into moisture-free coal by the rotation of furnace body and promotes dress
It sets, moisture-free coal lifting device uses bucket elevator；The vapor and dust generated in drying process is removed by bag filter
Qualified discharge after dirt.
- 1 raw coal analysis indexes of table
Moisture-free coal is promoted to moisture-free coal surge bunker by bucket elevator, and moisture-free coal passes sequentially through charging rotary valve, charging
Spiral is sent into rotary dry distillation furnace.Moisture-free coal stops 180min in rotary dry distillation furnace, by hot fume indirect heating to 500 DEG C, hair
Raw pyrolytic reaction, generates 250 DEG C of raw coke oven gas and 500 DEG C of hot semicoke.Rotary dry distillation furnace passes through cylinder using 800 DEG C of hot fumes
Body collet and built-in tubulation simultaneously heat material.Raw coke oven gas passes through rotary dry distillation stokehold end depositing dust case depositing dust and rotation
Enter recovery of chemical products process after wind dedusting, coal gas and tar, coal gas, tar and semicoke point are obtained by recovery of chemical products process
Analysis index is shown in Table -2, table -3 and table -4 respectively.The dust generated in Whirlwind cyclone by Whirlwind cyclone lower part ash releasing tube be directly discharged into
Expect in spiral, the dust generated in depositing dust case periodically passes through outside ash-valve discharge system.
Hot semicoke by the rotation of rotary dry distillation furnace be discharged into revolution cooling furnace in, revolution cooling furnace in hot semicoke with change
Hot tubulation indirect heat exchange, after being cooled to 50 DEG C outside discharge system.
- 2 tar analysis indexes of table
- 3 gas analysis index of table
- 4 semicoke analysis indexes of table
Embodiment 2
Using the raw coal of 0-6mm partial size, analysis indexes are shown in Table -1, dry to moisture 3%, revolution by rotary drying furnace
Drying oven is using external-heat steam pipe type rotary drying furnace.Moisture-free coal is discharged into moisture-free coal by the rotation of furnace body and promotes dress
It sets, moisture-free coal lifting device uses bucket elevator；The vapor and dust generated in drying process is removed by bag filter
Qualified discharge after dirt.
Moisture-free coal is promoted to moisture-free coal surge bunker by bucket elevator, and moisture-free coal stops in rotary dry distillation furnace
By hot fume indirect heating to 700 DEG C pyrolytic reaction occurs for 50min, generates 350 DEG C of raw coke oven gas and 650 DEG C of hot semicoke.
Rotary dry distillation furnace simultaneously heats material by cylinder collet and built-in tubulation using 600 DEG C of hot fumes.Raw coke oven gas passes through
Enter recovery of chemical products process after rotary dry distillation stokehold end depositing dust case depositing dust and Whirlwind cyclone dedusting, is obtained by recovery of chemical products process
To coal gas and tar, coal gas, tar and semicoke analysis indexes are shown in Table -5, table -6 and table -7 respectively.The dust generated in Whirlwind cyclone
It is directly discharged into feed auger by Whirlwind cyclone lower part ash releasing tube, the dust generated in depositing dust case is periodically discharged by ash-valve
Outside system.
- 5 tar analysis indexes of table
- 6 gas analysis index of table
- 7 semicoke analysis indexes of table
Hot semicoke by the rotation of rotary dry distillation furnace be discharged into revolution cooling furnace in, revolution cooling furnace in hot semicoke with change
Hot tubulation indirect heat exchange, after being cooled to 60 DEG C outside discharge system.
Embodiment 3
Using the raw coal of 0-30mm partial size, analysis indexes are shown in Table -1, dry to moisture 5%, revolution by rotary drying furnace
Drying oven is using external-heat steam pipe type rotary drying furnace.Moisture-free coal is discharged into moisture-free coal by the rotation of furnace body and promotes dress
It sets, moisture-free coal lifting device uses bucket elevator；The vapor and dust generated in drying process is removed by bag filter
Qualified discharge after dirt.
Moisture-free coal is promoted to moisture-free coal surge bunker by bucket elevator, and moisture-free coal passes sequentially through charging rotary valve, charging
Spiral is sent into rotary dry distillation furnace.Moisture-free coal stops 100min in rotary dry distillation furnace, by hot fume indirect heating to 600 DEG C, hair
Raw pyrolytic reaction, generates 300 DEG C of raw coke oven gas and 580 DEG C of hot semicoke.Rotary dry distillation furnace passes through cylinder using 700 DEG C of hot fumes
Body collet and built-in tubulation simultaneously heat material.Raw coke oven gas passes through rotary dry distillation stokehold end depositing dust case depositing dust and rotation
Enter recovery of chemical products process after wind dedusting, coal gas and tar, coal gas, tar and semicoke point are obtained by recovery of chemical products process
Analysis index is shown in Table -8, table -9 and table -10 respectively.The dust generated in Whirlwind cyclone is directly discharged by Whirlwind cyclone lower part ash releasing tube
In feed auger, the dust generated in depositing dust case periodically passes through outside ash-valve discharge system.
- 8 tar analysis indexes of table
- 9 gas analysis index of table
- 10 semicoke analysis indexes of table
Hot semicoke by the rotation of rotary dry distillation furnace be discharged into revolution cooling furnace in, revolution cooling furnace in hot semicoke with change
Hot tubulation indirect heat exchange, after being cooled to 100 DEG C outside discharge system.
As can be seen from the above embodiments, the tar quality using the method for the present invention and equipment is good, and toluene insolubles are little
It is not more than 5.2% in 3.96%, Kang Shi carbon residue, mechanical admixture is not more than 2.09%.The present invention prepares tar quality to be a kind of
It can the good pyrolysis installation and method.
The present invention is not limited to the above embodiments, on the basis of technical solution disclosed by the invention, the skill of this field
According to disclosed technology contents, some of which technical characteristic can be made art personnel by not needing creative labor
Some replacements and deformation, these replacements and deformation are within the scope of the invention.
Claims (11)
1. a kind of external heat type rotary furnace coal pyrolysis method with internal dedusting, which comprises the following steps:
(1) raw coal of 0-30mm partial size is dry to obtained moisture-free coal after moisture≤7%, the moisture-free coal by rotary drying furnace
Moisture-free coal lifting device is discharged by the rotation of the rotary drying furnace body；
(2) moisture-free coal is promoted to moisture-free coal surge bunker by the moisture-free coal lifting device, and the moisture-free coal passes sequentially through
Feed rotary valve, feed auger is sent into rotary dry distillation furnace；
(3) by hot fume indirect heating in rotary dry distillation furnace pyrolytic reaction occurs for the moisture-free coal, generates raw coke oven gas and heat half
It is burnt；
(4) raw coke oven gas is laggard by the depositing dust case depositing dust and Whirlwind cyclone dedusting being connected directly with rotary dry distillation stokehold end
Enter recovery of chemical products process, the coal tar of coal gas and toluene insolubles≤4% without dust is obtained by the recovery of chemical products process
Oil；
(5) the hot semicoke is discharged into revolution cooling furnace by the rotation of the rotary dry distillation furnace, in the revolution cooling furnace
It is discharged after the hot semicoke is cooled, semicoke is made.
2. the external heat type rotary furnace coal pyrolysis method according to claim 1 with internal dedusting, which is characterized in that
In the step (3), the moisture-free coal in the rotary dry distillation furnace by the hot fume indirect heating when, heating temperature is
500-700 DEG C, heating time 50-180min.
3. the external heat type rotary furnace coal pyrolysis method according to claim 1 with internal dedusting, which is characterized in that
In the step (5), in the revolution cooling furnace, the hot semicoke is cooled to 30-100 DEG C.
4. the external heat type rotary furnace coal pyrolysis method according to claim 1 with internal dedusting, which is characterized in that institute
The dust for stating Whirlwind cyclone collection is directly entered feed auger, and the dust that the depositing dust case is collected is discharged by ash-valve.
5. the external heat type rotary furnace coal pyrolysis method according to claim 1 with internal dedusting, which is characterized in that institute
It is cooling by the way of the recirculated cooling water and the hot semicoke indirect heat exchange in built-in tubulation to state revolution cooling furnace.
6. a kind of external heat type rotary furnace coal pyrolysis device with internal dedusting, which is characterized in that including rotary drying furnace, do
Dry coal lifting device, the moisture-free coal surge bunker being connected to the rotary drying furnace, the moisture-free coal surge bunker pass through charging rotation
Valve is connected to depositing dust case with feed auger, and the depositing dust case is connected to rotary dry distillation furnace；Whirlwind cyclone, the rotation are equipped in the depositing dust case
One end of wind is connected to recovery of chemical products system, and the other end is connected to the feed auger；The rotary dry distillation furnace connection revolution
Cooling furnace.
7. the external heat type rotary furnace coal pyrolysis device according to claim 6 with internal dedusting, which is characterized in that institute
It states rotary dry distillation furnace and is communicated with dust cleaning case, the rotary drying furnace is internal heat type or external-heating revolving drying oven, the dust cleaning case
It is provided with collet, hot fume heat tracing is passed through in the collet.
8. the external heat type rotary furnace coal pyrolysis device according to claim 6 with internal dedusting, which is characterized in that institute
Rotary dry distillation furnace is stated using hot fume indirect heating, the indirect heating can be cylinder jacket type structure, built-in shell and tube knot
Structure or cylinder jacket type and built-in tubular structure.
9. the external heat type rotary furnace coal pyrolysis device according to claim 6 with internal dedusting, which is characterized in that institute
It states depositing dust case and the cylinder leading portion of the rotary dry distillation furnace is connected directly by static and dynamic sealing.
10. the external heat type rotary furnace coal pyrolysis device according to claim 6 with internal dedusting, which is characterized in that
The depositing dust case is acted on by gravitational settling and carries out primary depositing dust to dust-laden raw coke oven gas.
11. the external heat type rotary furnace coal pyrolysis device according to claim 6 with internal dedusting, which is characterized in that
The Whirlwind cyclone is arranged in the depositing dust case, can be one or more, can be arranged in rows when multiple or cloth in a ring
It sets；Dusty gas rotates into the Whirlwind cyclone along a tangential direction, dust separated with raw coke oven gas by centrifugal force and incite somebody to action
Dust catching makes the dust flow into the charging spiral shell by ash releasing tube in the air-exhausting duct of the Whirlwind cyclone, then by gravity
Rotation.
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| CN114381288A (en) * | 2021-12-30 | 2022-04-22 | 中国科学院广州能源研究所 | Pyrolysis carbonization device suitable for high-humidity biomass |
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